function out = SIMM(x, y, z, a, b2, c)
%% 3D-SIMM 系统函数
    x1 = sin(b2*z) * sin(c/x);
    y1 = sin(b2*x1) * sin(c/y);
    z1 = sin(b2*y1) * sin(c/z);
    x_new = a * x1;
    y_new = a * y1;
    z_new = a * z1;
    out = [x_new; y_new; z_new];
end
